FUCUS Fu"cus, n.; pl. Fuci. Etym: [L. rock lichen, orchil, used as a red dye, red or purple color, disguise, deceit.]
1. A paint; a dye; also, false show. [Obs.]
2. (Bot.)
Defn: A genus of tough, leathery seaweeds, usually of a dull brownish green color; rockweed.
Note: Formerly most marine alg were called fuci.
FUCUSOL
Fu"cu*sol, n. Etym: [Fucus + L. oleum oil.] (Chem.)
Defn: An oily liquid, resembling, and possibly identical with, furfurol, and obtained from fucus, and other seaweeds.
FUD
Fud, n. Etym: [Of uncertain origin.]
1. The tail of a hare, coney, etc. [Prov. Eng. & Scot.] Burns.
2. Woolen waste, for mixing with mungo and shoddy.